Valve



Nov. 8, 1927. 1,648,486

0. LARS EN VALVE Filed Jan. 22.1925

Patented Nov. 8, 192?,

0mm LARSEN, or roar arnrnson, wise-ens. 1F

AGE MFG. COMPANY, or cnrceeo, ZLLlNuiS,

1 vnnvn.

iron to cesarean; race:- a cenronarron orv rumors.

Application filed January 22, 1925. Serial no. 3,926.

The invention relates to valves for the control of the flow of ediblefluids, and known as sanitary valves.

In the preparation of milk for food consumption, one of theprocessesemployed is Pasteurizatiomby which the pathogenic bacteria'aredestroyed. The generally. accepted method of ,Pas'teurization is to holdquanti ties of milkat a predetermined temperature fora predeterminedtime ininsulated or heated containers of large capacity. The milk isordinarily treated in successive batches, the containers being filledand emptied through sanitary piping controlled by sanitary valvespositioned at the inletsand outlets of the containers. It will beobvious that any leakage or failure in these valves will pe "mit theuncontrolled flow through the container ot a quantity of milk which hasnot been heldttor the required time at the necessarytemperature. Ii suchleakage-is permitted to pass into thedischarge conduits with theproperly Pasteurized milk the latter is in danger of reinocula'tion bythe undestroyed bacteria in the milk which has escaped the prescribedtreatment,

Also, it is obviously necessary that all con tainerspiping andcontrolling valves used in the treatment of milk for food consumption bekept in a sanitary condition. This requires that such apparatus beconstructed so that the parts may be readily dis-assent bled for thorou'h cleanin after their opera tive use.

It is the principal object of this invention to provide an improvedsanitary valve which is constructed to direct out vardly from the mainpassages any leakage occurring in the valve when it is in closedposition,and es pecially adapted to wholly drain the valve chamber oisuch leakage when operating on a substantially vertical axis, as whencontrolling downwardly opening outlet. A further object is to provide avalve of simple construction having few parts which may be convenientlyand quickly taken down for cleaning.

Other objects and advantages will be apparent in the following detaileddescription of a preferred embodiment of theinvention which I haveselected for illustration in the accompanying drawings. It will beunderstood, however, that various changes in form, construction andarrangement may be made by those skilled in the art without departingfrom the scopeandspirit of the invention as expressed 1n the appendedclaim.

Referring to the drawings, Flg. 1 is a sectional side elevation of thevalve, and Fig. 2

is a front elevation of the same. The reference numeral 1 indicates thebottom wall of a Pasteurizing holder having an'inner lining 2. A tube 3extends through the wall 1 and lining 2 and opens into the interior ofthe holder, forming adownward discharge outlet for the contents or theholder The preferably flared upper end of the tube/3 engages a taperedseat 1 in the lining in substantially flush relation thereto,a'ndispreferably secured inpositionby means of a flanged nut 5 threadedupon the lower portion of the tube and bearing upon the'wall 1. Thethreaded lower end of the tube 3 carries a union nut 6 by means of whicha sleeve 7isdetachablysecured to the tube 3 in continuation of thepassage therethrough.

I Thesleeve 7 is rigidly attached to and carries casing 8 having achamber 9 opening upwardly in communication with the passage through thetube 3 and sleeve 7, and openin laterally into the passage 10 formed ina lateral extension 11 of the casing The passage through the tube 3 iscontrolled by a valve 12 at its upper end having its seat in the flaredend of the tube and having a depending web 13 from which. extend guidearms 14 having sliding engagement with the inner surface otthe tube. Thevalve 12 is operated by a rod 15 extending upwardly into positionfor-manual or mechanical manipulation,- and preferably having a flexibleconnection with the valve herein'illustrated ascomprising a ball member16 at the end otthe operating rod seated in a socket 17' mounted on theupper face of the valve and operativel'y' secured therein by a retainingnut 18.

The casing 8 is constructed preferably with an open lower end into whichis removablv titted a closure plug 19 having a flanged lower end 20abutting the end of the casing and secured in position by the union. nut21. The upper surface of the plug 19 forms the bottom of the chamber 9,and is radially'inclined inwardly to form a sump tor the accumulation ofany leakage,

at the center of which opens a passage 22 extending down through theplug and preferably communicating with a leakage discharge pipe 28. Thesump formed in the upper face of the closure plug 19 extends downwardlyfrom the outlet 10 to receive any baclnflow leakage from the out-let aswell as leakage from the inlet. I

The passage 22 is controlled by a valve 24 dimensioned to slidably enterthe constricted upper portion of the passage and effect the closurethereof. The valve 24 is operatively supported by a stem 25 having apreferably flexible connection with the under structure of the valve12,: herein: illustrated as comprising a ball 26 carried on the upperend of the stem, the ball beingseat-ed in a socket 27 formed in the web13 and operatively secured in position by a retaining nut 28. The stem25 is ofsuch length that when the valve 12 is seated in-closed position,the valve 24 is suspended in the enlarged lower portion of the passage22, leaving the latter open for the free escape ofany leakageof liquidpast the valve 12 which flows down into the sump at the bottom ofthe-chamber 9. WVhen the valve 12 is operatively raised from its seat, adependingcylindrical flange 29 maintains the closure of the tube '3until the valve 24 is drawn up into the constricted portion of thepassage, effecting the-closure of the latter against the loss of :anyliquid passing normally through'the valve casing when the valve 12 isfully open.

In the embodiment of the invention herein disclosed, the main outletpassage 10 is also valve-controlled. The outer end of the casingextension 11 is formed with a recessed flange upon which is: removablysupported a valve seat ring 30, itsaperture continuing the passage 10.The outer face of the ring 30 is preferably angularly disposed to avertical plane, and forms a seat for a check valve 31. The latter ispivotally supported on an arm 32 which is hinged to a bifurcated lug 33formed on the upper portion of the ring 30. Thering 30 and check valve31 are enclosed in a shell 34, theouter end of which is preferablyformed as at 35 suitably for union connection withpiping to carry awaythe liquid discharged through the valve structure. The shell 34 "andring 30 are removably secured'tothe casing extension 11 by means ofthumb-nuts 36.1bearing upon bifurcated radial lugs 37 formed radial arms39 formed integrally with the casing extension 11,the ring 30- beingprovided with an outer flange extending between the shell and the faceof the casing extension.

The check valve 31. with its seat ring and enclosing shell, maybeldispensed with when the valve structure is employed in such.arrangement of the discharge piping that there isnno possibility of backflow,.as in controlling the filling of a vat or. holder from above thelevel of the liquid inthe vat. In such case any leakage from the valve12after it has been closed, will flow into the passage at the bottom ofthe chamber 9 21s before "described, and not be admitted to the holderafter the prescribed period of holding time has begun'to run.

I claim as my invention:

A device of the class described, comprising. a casing having a chamberwith an :upward inlet opening and a lateral outlet opening and with adownward passage opening from said chamber substantially opposite tosaid inlet opening, avalvecontrolling said outlet opening, a valveoperatively seated outwardly of and controlling said inlet opening andhaving a pendent portion extending into said chamber to guide themovement of said inlet valve, a stem de pending fromthe pendent portionof said inlet valve through said passage and secured to saidpendentportion suitably for universal lateral movementof the free end ofsaidstempand a valve mounted on the free end of said stem normallypositioned outwardly of said passage and adapted to control saidpassage, said passage valve being arranged to enter said passage andeffect a closure thereof with the opening movement of said inlet valveand to pass outwardly of said passage with the opening ofsaid inletvalve.

IIn w itness whereof I have hereunto 5 attached my signature.

OLA-F. LARSEN.

